Questions & Answers for: Mitsubishi code 401

...code 401 The code 401 is for the EGR system meaning that the passages inside the INTAKE MANIFOLD are plugged up with carbon or the EGR valve is faulty, Idle the car, use a vacuum pump to open the EGR ...

trouble codes 171, 174, 137 & 401 came on after engine replacemen trouble codes 171, 174, 137 & 401 after engine replaced by carmax did they ever reflash the ecm with the new codes for the ...

...code 401 after putting in a new egr valve I have also replaced O2 sensors and cannot figure out why the code keeps coming up make sure egr passage way from valve to intake not clogged and make sure ...

...code 401 on 2001 eclipse A code P0401 most likely means one or more of the following has happened: ?The DPFE (differential pressure feedback EGR) sensor is faulty and needs to be replaced ?There is a ...

obd code 401 DTC's (trouble codes) are 4 digits long. I am taking it that you mean P0401.Here is a link to a page that explains the code and the possible fixes: http://www.obd-codes.com/p0401

...a weak mixture so a fault with the O2 sensors is more likely to be your proble as this is what the codes 171/174 mean and 401 is insufficient gas recycling ,use a multimeter to check the O2 sensors ...

...Code 401 Changed EGR valve and EGR Lite comes back on drive about 5 miles checked for vacume leaks Sounds like to me you have a faulty EGR vacuum solenoid which regulates the vacuum pressure sent to ...

...code 401 on Montero 2000 Code 401 (P0401) indicates improper flow in the EGR. This type is vacuum operated. There is a good chance the vacuum line is leaking. Check the vacuum line ( a black rubber ...

...401 CODE ON 2001 ECLIPSE CHANGED EGR,CHANGED HOSES TO EGR. CLEANED OUT WHERE EGR GOES. STILL PULLING CODE. ABOUT TO BEAT IT WITH A HAMMER!!!!!! Is the solenoid opening to provide vacuum to the egr ...